Update GxEPD2_EPD.cpp

fix for RP2040
ZinggJM · Oct 5, 2023 · 260ffc6 · 260ffc6
1 parent 283ed63
commit 260ffc6
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/src/GxEPD2_EPD.cpp b/src/GxEPD2_EPD.cpp
@@ -54,13 +54,15 @@ void GxEPD2_EPD::init(uint32_t serial_diag_bitrate, bool initial, uint16_t reset
   }
   if (_cs >= 0)
   {
-    digitalWrite(_cs, HIGH);
+    digitalWrite(_cs, HIGH); // preset (less glitch for any analyzer)
     pinMode(_cs, OUTPUT);
+    digitalWrite(_cs, HIGH); // set (needed e.g. for RP2040)
   }
   if (_dc >= 0)
   {
-    digitalWrite(_dc, HIGH);
+    digitalWrite(_dc, HIGH); // preset (less glitch for any analyzer)
     pinMode(_dc, OUTPUT);
+    digitalWrite(_dc, HIGH); // set (needed e.g. for RP2040)
   }
   _reset();
   if (_busy >= 0)
@@ -110,14 +112,16 @@ void GxEPD2_EPD::_reset()
     {
       digitalWrite(_rst, LOW);
       pinMode(_rst, OUTPUT);
+      digitalWrite(_rst, LOW);
       delay(_reset_duration);
       pinMode(_rst, INPUT_PULLUP);
       delay(_reset_duration > 10 ? _reset_duration : 10);
     }
     else
     {
-      digitalWrite(_rst, HIGH); // NEEDED for Waveshare "clever" reset circuit, power controller before reset pulse
+      digitalWrite(_rst, HIGH); // NEEDED for Waveshare "clever" reset circuit, power controller before reset pulse, preset (less glitch for any analyzer)
       pinMode(_rst, OUTPUT);
+      digitalWrite(_rst, HIGH); // NEEDED for Waveshare "clever" reset circuit, power controller before reset pulse, set (needed e.g. for RP2040)
       delay(10); // NEEDED for Waveshare "clever" reset circuit, at least delay(2);
       digitalWrite(_rst, LOW);
       delay(_reset_duration);